\( z_1, z_2, z_3 \) represent the vertices A, B, C of a triangle ABC respectively in the Argand plane. If
\[ |z_1 - z_2| = \sqrt{25 - 12 \sqrt{3}}, \] \[ \left|\frac{z_1 - z_3}{z_2 - z_3}\right| = \frac{3}{4}, \] \[ \text{and } \angle ACB = 30^\circ, \]
Then the area (in sq. units) of that triangle is:
If \( z \) is a complex number and \( k \in \mathbb{R} \), such that \( |z| = 1 \), \[ \frac{2 + k^2 z}{k + \overline{z}} = kz, \] then the maximum distance from \( k + i k^2 \) to the circle \( |z - (1 + 2i)| = 1 \) is:
For a non-zero complex number $ z $, let $\arg(z)$ denote the principal argument of $ z $, with $-\pi < \arg(z) \leq \pi$. Let $\omega$ be the cube root of unity for which $0 < \arg(\omega) < \pi$. Let $$ \alpha = \arg \left( \sum_{n=1}^{2025} (-\omega)^n \right). $$ Then the value of $\frac{3 \alpha}{\pi}$ is _____.